Fluoroscopic x-ray system



H. F. WAITE. FLUOROSCOPIC X-RAY SYSTEM. APPLICATION FILED Nov. 20,1920..

1,400,333. mama Dec 13, 1921 INVENTORI 14 6/9127 rr'fl/rs moaNEv STATEfiPATENT OFFICE,

HAEiTiaY E. \VHTE, OF NEW YORK, N. Y.

FLUDRO SCCfiIG Iii-RAY SYSTEM.

mosses. 4

Specification of Letters Patent. Patented Dec. 13, 1921.,

Amilioatlon filed November 20, 1920. Serial No.' 425,295.

To all whom may concern Be it known that 1.,[HAi-1nn WVAITE, a citizenof the United States, and a resident of the city of New York, county ofQueens, and State of New Yon, have invented a new and useful Improvementin Fiuoroscopic' lid-lay Systems, of which the following is aspecification; v

In systems of this character, it is necessary to have a movable screenwhich may be placed at any desired level, and back of it and in properrelation thereto, there is an X-ray tube which is shifted by horizontaland vertical movements according to the needs of the operator using thedevice, In

such devices it has heretofore been customary to supply both the cathodeand the anode of the tube with electricity brought through wires whichare mounted on spring controlled spools which automatically compensatefor the position of the tube, which is movable with regard to thetransformer, which is fixed. While this wire connection with the cathodeis desirable, the other connection with the anode is undesirable becausethe anode is at the top of the tube and therefore not'acccssib-le to aconnection with the wire on the spool which ,is located below the tubeand on the. transformer and for the additional reason, this anode wirewill at times function badly so that it produces a corona effect w ionthe tube is in use and thereby greatly impairs the usefulness of thetube.

g drawings, forming part hereof, vhicii---- Figure iis a perspectiveview, partially broken. am y, ot a vertical fluoroscopic unit embodyingmy invention.

2, a sectional view showing a detail of construction.

Throughout the various views of the drawings, similar referencecharacters designate similar parts.

My improved unit 1 is provided with the conventionalfluoroscopic screen2 mounted in the usual manner by cords 3 which'pass over pulleys a onthe top of a cabinet 5 to a counter-weight, not shown, which is alsoconnected to a cord 6 which runs over a pulley 7 to a vertical, movableframe 8 which carries a horizontal, movable frame 9 which in turn isprovided with a bracket 10 that supports the casing 11 of an X-ray tube12 in the conventional manner.

The bottom of the unit is provided. with a transformer 13 which isconnected in the conventional manner with any suitable source ofelectricity through a cable conductor 14 and has a secondcable 15 thatruns to a regulator 16 and it also carries a cut out switch 17 which isconnected in any suitable manner with the transformer 13. Thistransformer 13 also has a cathode lead cathode end of the tube 12, inthe conventional manner, and another lead 20 which is connected to a'rodor tube 21 by a conductor 22 and this rod 21' has its lower end securedin a suitable insulating socket 23 which rests ontop of the transformer13 and is supported in any suitable way and its upper and terminates ina correspondinng insulator 24 which is fixed at the top of the cabinet5. This rod on tube 21 is made of very large diameter as compared'withthe diameter of a wire such as has been described above, which isgenerally used for" supplying electricity to an X ray tube and '18which'is connected by a cable 19 with the and the turnin of these artsonthe rod 21 and anode 27 respectively, permit ample compensation to bemade'for all horizontal movements of the frame 9 and the sliding of. thepart 25 on the rod 21 provides for all vertical movements of the. frame8 so that when the tube is shifted either horizon I I or vertically, orboth, a proper electrical connection is always made betwv it' e anodeand the transformer-and it is aiic with a large conductor which islargev enough to overcome all corona tendencies which are veryobjectionable as they 1i ht up what should be a dark room. They a sorelease ozone.

While I have shown and described one embodiment'of my invention, it isobvious that it is not restricted thereto but isbroad enough to coverall structures that come tube, means for connecting the cathode of 15the tube to the said source of electricity and ed, pivoted and daterallyextending means 20 so that when the device is in use the anode andsourceof electrical supply will always be properly connected .by a conductorof large capacity which will overcome or reduce corona eifects.

In testimony whereof I have set my hand this 12th day of N ovember,1920.

HARRY F. WAITE.

